Carpenter&#39;s plane



7 April 1944- A. H. LAVIEVTES I 2,347,570

CARPENTER S PLANE Filed Dec. 28, 1942 M 'II n'wv 0 ma 1 flnocnfoa WM 11/w M h5 0;

Patented Apr. 25, 1944 UNITED STATE S PATENT' OFFICE,

This invention relates to carpenters planes" andhas for an object toprovide an improved adjusting'means for the blade of this type of plane,

and one which is simple and requires a very small number of parts,willbe inexpensive to manufacture; and particularly a construction inwhich not only longitudinal adjustment of the blade may be efiected toadjust the depth of cut, but also lateral or angular adjustment may beeasily made so that the cutting edge. may be easily located parallel tothe. bearing surface of the bottom plate'of the. frame to give a uniformdepth of out.

, With the foregoing and other objects. in view,

I have devised the construction illustrated in the accompanying drawingforming a part of this specification. It is, however, to be understoodthat the invention is. not limited to the specific details andarrangement shown, but may employ various changes and modificationswithin the scope of the invention.

In this drawing:

Fig. 1 is a top plan view of the device;

Fig. 2 is a vertical longitudinal section;

Fig. 3 is a top plan view of a portion of the adjusting mechanism;

Fig. 4 is a transverse section substantially on line 4-4 of Fig. 3;

Fig. 5 is an elevation of the adjusting screw beforeassembly, and

Fig. 6 is a side and elevation of the adjusting head for the screw.

The device comprises the body ll] having the usual bottom plate I Iprovided with a fiat smooth undersurface to ride on the surface of thework, with upright side walls or strengthening ribs L2 at the oppositeedges thereof. At the front of the bottom plate is a hand knob 13mounted in any suitable way, as by the bolt l4, and at the rear and isanother hand grip 15 mounted on the base by a bolt I6. The bottom plateis provided with a transverse slot I! through which may project thecutting edge 18 of the blade I 9 supported on the upright transverse rib20 and the inclined transverse wall or rib 2!. At the upper side of theblade, to hold it in position, is the clamp plate or block 22 adapted topress at its lower end 23 on the top of the blade a short distance abovethe cutting edge, and it has a transverse groove 24 in its top wall inwhich may seat the transverse rod 25 mounted at its opposite ends in theupright side walls or ribs l2. The top surface of the lower edge 23 maybe curved or rounded to form a breaker for the chips. The clamp plate 22also carries a clamping screw 26 threaded in the plate and adapted topress against the blade [9 at its lower end.

The clamp plate 22 is provided with twoupright longitudinally spacedlugs 21 and 28 which may be formed integral with the plate and be tweenthem the plate is provided with a longitudinal slot 29 extendingtherethrough. These lugs 21 and 28 formbearings for the adjusting screw30, the inner or lower end of the screw being reduced as indicated at 3|for bearing in the lug 21,

thereduction forming a shoulder 32 to engage the. upper surface of. thelug while the upper endportion 33 is left smooth for bearing in the lug28. The upper endis reduced'at 34 to receive a 1 knurled knob or head 35which forms a finger grip for operating the screw. This can be a discofsui'table. thicknessv with a centralopening 3.6 made slightly smallerthan the reduced portion 34 so that it may be mounted on the screw bymerely forcing this reduced .portion into the opening, but it is aforced fit so that the friction is sufilcient to retain the knob on thescrew and to operate the screw. The inner end 3| is bored or recessedlongitudinally as indicated at 31 and the reduced portion 3| is somewhatlonger than the thickness of the lug 21.

Threaded on the screw between the lugs 21 and 28 is an adjusting nut 38which has a downward extension 39 within the slot 29 of the clampingplate and projecting at its free end into an opening 40 in the blade l9.Above the screw 30 this nut has an extension 4| forming a finger grip bymeans of which the nut may be adjusted or swung laterally. The screw maybe assembled in the clamping plate 22 by inserting it through the lug 28and threading it into the nut 38. The reduced lower end 3| can then beinserted in the lug 21 and the free end of the recessed portion can bespread outwardly or rolled over, as indicated at 42, to retain it in thelug. It will be seen that this is a very simple assembly operation andone by which the necessary assembling operations may be reduced to aminimum. It also greatly simplifies the construction of the screw, as itmay be made from a piece of round rod merely threaded the proper lengthand all the turning required is for the reduced portions 3| and 34 atits opposite ends. The screw can therefore be readily made in anautomatic screw machine with simple operations and giving very littlescrap or waste material.

In use, when it is desired to shift the blade Hi to adjust the depth ofthe cut, all that is necessary is to loosen the clamping screw 26 andthen adjust the blade I9 longitudinally by turning screw 30. This shiftsthe nut 38 longitudinally which, acting through its extension 39 in theopening 40 in the blade, will carry the blade with the movements of thenut. If the cutting edge 18 is not parallel with the surface of the baseplate H the blade can be easily and quickly adjusted to make thiscutting edge parallel with the surface by means of the finger grip 4| onthe nut 38. That is, by gripping this finger grip 4| and moving itlaterally either to the right or left, the lower extension 39 of the nutwill be swung laterally and through its action on the sides of theopening 40 in the blade will adjust the upper end of the blade laterallyin either direction and thus adjusting the angular position of thecutting edge, and by this means the cutting edge l8 may be locatedparallel with the under surface of the base ll. When the blade has beenadjusted longitudinally, or laterally or angularly to the desiredposition, it may be clamped in this position by'means of the clampingscrew 26. The width of the bladeis less than the distance between theside walls l2 to permit this angular or lateral movement of the blade.It will be seen that the slot 29 in the clamping plate 22 isconsiderably wider than the extension 39 of the nut so as to permitsuificient lateral movement of the extension 39 in efiecting the angularadjustment of the blade. The. cross rod 25 seating in groove 24 insthetop of the clamp plate 22 forms a fulcrum for this plate, and the rodand groove coact to hold the plate against longitudinal movement.

It will be seen from the-above that this provides a very simple andeffective structure which can be manufactured and assembled with aminimum number of operations and with a minimum loss of material inscrap; also that the blade may not only be readily adjustedlongitudinally to properly locate the blade to give the desiredprojection of the cutting edge below the bearing surface II for thedesired depth of cut, but further that it may be readily adjustedangularly to insure that this cutting edge is parallel to the surface ofthe plate II to insure a uniform depth of cut throughout the entirewidth of the blade. As the blade can be thus adjusted, it is notnecessary for the operator to insurethat the cutting edge is ground atexactly right angles to the sides of the blade, and it readily insuresthat there is no danger of one edge of the blade being lower than theother to dig into the surface of the work and make a slight ridge in thesurface.

Having thus described the nature of my invention, what I claim is:

In a plane of the character described, a base having a transverse slot,an inclined blade having a cutting edge adapted to project through saidslot and its opposite end adapted for lateral movement to adjust thecutting edge into parallelism with the base, a clamp lplate above theblade, a longitudinally extending adjusting screw carried by the plate,a longitudinal slot through the plate, an adjusting nut on the screwprovided with an extension projecting through the second slot and intoan opening in the blade to cause the blade to move with the nut, saidlatter slot being Widenthan the extension to peri mit lateral movementof the extension in the slot, and an extension on the nut opposite thefirst extension providing a lever for turning the nut laterally on thescrew to shift the upper end of the blade laterally to adjust theangular position of its cutting edge in the base.

ABRAHAM H. LAVIETES.

